Multi-core Parallelism

As I mentioned in a previous blog, I am running a six-core machine – it is actually a virtual machine. Regardless, I noticed one thing while doing it. As I went from single-core to six-core, performance improved accordingly. But when I went up to eight-core, things deteriorated. The reason for this is probably because of the arrangement of the processors. I am running a two-socketed six-core AMD system. So, for an eight-core machine to work, it would need to cross sockets, which is not a good idea due to the communications hierarchy.

So, that’s why I ended up using a six-core VM.